Switch.



P. C. GHLAN.

,SWITGH.

APPLICATION FILED AUG. 6, 1910.

993,756. Patented May 30, 191.1.

WITNESSES INVENTOR aim M 5011i 67 'fi/azz WM (21 KQ M 25 a part of this specification, an

1 UNITED STATES PATENT OFFICE.

FRANK d. CHLAN, F BALTIMORE, MARYLAND, ASSIGNOR OF ONE-HALF TO CHARLES L. STOCKHAUSEN, OF BALTIMORE, MARYLAND.

swrrcn.

of the push-button type.

An im ortant object of this invention .is

. to rovi e a switch of the above character,

inc uding a single ush-button, which is pushed to open and c ose the circuit.

A further object of this invention is topi'ovide means for causing a quick movement ofthe contact arm, whereby sparking at the contacts is prevented.

A further object of this invention is to provide a switch of the above I character which issimple in construction, cheap to manufacture and efiicient in its operation.

Other objects and advantages of this invention will be apparent in the course of the following description.

In the accompanying drawin s, forming in which Ellie numerals are employed to designate e a si e view of t e switch, Fig. 2 is an end view of the same, Fig. 3 is an enlarged side view of the swinging lever forming a part of the switch, Fig. 4 is a similar view of the reciprocatory rod, Fig. 5 is a similar view of the contact arm or lever, Fig. 6 is a side view of a bracket forminga portion of the switch.

In the drawings, wherein is illustrated a preferred'em'bodnnentof my invention, the numeral 1 designates a plate to which is fixedly secured a flat strip 2, forming supporting means for the parts of the switch to be described. The strip 2 has one end thereof provided with a flange 3, disposed upon suitable insulating material 4 and secured to the plate 1by means ,of screws 5. Upon the central portion of the strip 2 is arranged an approximately U shaped bracket 6, which is provided with apertured ears. 7 for receiving screws 8, whereby said bracket may be rigldl secured to the strip 2. The transverse en s 9 and 10 of this approximately U-shaped bracket are provided with suitable o enlngs to receive a recipro-- catory push-r0 11. One end of this push:

rod is pivotally connected with a push-but Specification of Letters Patent.

Application filed August 6, 1910. Serial No. 575,888.

arts throughout the same, Figure 1 is Patented May 30, 1911.

ton .12, as shown -at13, sai

opening formed through the plate 1. This push-button may be formed of any suitableinsulating material. The push-rod 11 carries a compressible coil "spring 14 dis osed.

within the bracket 6, one end of whic en-. gages the transverse end 9 and the other end a pin 15 which is rigidly mounted upon said push-rod 11. The function of the spring 14. is to return the push-rod and.push-button to' their normal position, as clearly illustrated in Fig. 2.

Arran ed near and to one side of the inner en of the push-rod 11, is a swinging lever 16 having one end thereof bent at substantially right angles as shown at 17 for rigid engagement with a head 18. his head is pivotally connected with the 'p 2, as shown at 19. The head 18 has one e of this V-sha ed ortion, where y the engaging faceo the ead 19 is approximately W-shaped. The inner end of t e push-rod 11 is blfurcated as shown at 22 for receivin a roller 23 adaipted to engage the V-sha e i d is portion 20 an ears 21. This push-r0 provided uponits side adjacent the strip 2 with a second roller 24 to engage tracks or guides 25 formed upon the transverse end 9 of the ap roximately U-sha ed bracket. The free en of the swinging ever 16 carries a screw or the like, as shown at 26 which is fixedly secured to said lever and engaged b one end of a retractile coil spring 27, aving its opposite end connected with a screw 28 or the like, which in turn is. fixedly mounted upon a swinging contact arm 29. This contact arm is pivotally connected with the transverse end 10, as shown at 30. The contact arm 29 is provided intermediate its ends with an elongated opening 31 formed therethrough, within which is disposed the screw 26 above referred to.

.Adapted'to be engaged by the free end of the contact arm 29, is a suitabl supported stationary contact 32, to which is connected a wire 33 having connection with one pole of a source of current 34. The opposite pole of this source of current is connected with a wire 35 having suitable electrical connection with the contact arm 29.

.In Fig. 1 the contact arm 29 is shown as push-button bemg disposed for operation wlthin a suitable thereof provided with a' V-shaped central portion 20 and ears 21 upon op osite sides engaging the stationary contact 32, whereby '110 the circuit is closed; When the operator presses the pushbutton inwardly the recipan inclined position so that the apex of said rocatory push-rod v11 moves inwardly and engages one side of the V-shaped portion 20 of the head 19, it being understood that this head is always retained by the spring 27 in V-shaped portion will be to one side of the roller 23. The roller. 23 travels along this inclined side until it engages the ear 21, when with further pressure upon the button', said head together with its swinging lever.16 will be oscillated downwardly. This oscillation of the swinging lever causes the spring 27 to be placed under tensionwhereby the contact arm 29 is given a quick jerk to efl'ect its disengagement with the stationary contact 32. The contact arm 29 is thus oscillated downwardly out of engagement with the stationary contact 32 and held in such downward position by the spring 27.

When the push-button is released the same together w1th push-rod 12' is returned to its outermost position by the spring 14. When the push-rod is traveling away from 'q thehead 19 its roller 24 engages one of the tracks 25 and said push-rod is accordingly returned to its proper central position with relation to said approximately U-shaped bracket. This is an important feature of the invention, inasmuch as it disposes the roller 23 upon one side of the apex of the V-shaped portlon 20. If the push-button is again pressed, the roller 23 engages the opposite side of the V-shaped portion 20 and en- 1 counters the other ear 21 to oscillate the swinging lever 16 upwardly. The contact arm 29 is accordingly oscillated upwardly by virtue of the spring 27 and associated members, whereby said contact arm is thrown into quick engagement with the stationary contact 32, and the circuit closed. Iwish it understood thatthe form of my invention, herewith shown and described is to be taken as a preferred example of the same, and that certain changes in the shape,

size and arrangement of parts may be re sorted to without departing from the spirit of m invention or the scope of the subjoine claims.

Having fully described my invention, I claim 1. In an electric switch of the character described, a supporting structure, a head provided with an ap roximately W-shaped engaging face pivota y connected with said supporting structure,-a lever connected with and adapted to be moved by said head, a push-rod having slidable engagement with the su porting structure and disposed upon one si e of said head, said push-rod bemg adapted to eflfect a movement of the head when moved toward the same, a pivoted contact arm to be moved bysaid lever, tracks separate from and disposed at a oint spaced from the engaging face of sai head, and

means connected, with the push-rod to en-' ga e said tracks, whereby said push-rod is guided during its movement away fromsaid head so that the same may assume a proper.

position with relation to the k same, said means being always out of engagement with said head.

' 2. In an electric switch of the character described, a supporting structure, a head provided with an engaging face-pivotally connected with said supporting structure, a

lever connected with and adapted to be moved by said head, a push-rod disposed nearsaid head to eflect a movement of the same when moved toward the said head, a

pivoted contact arm, connecting means between said lever andcontactarm ncluding, j

disposed at a point spaced rom said head,

an electric member, tracks se arate from and means connected with the push-rod to engage said tracks to guide the same during its movement away from said head, and means to cause said pushrod to move away from said head.

3. Inan electric switch of the character described, a supporting structure, a head 1 nected with the push-rod to travel upon said track to guide the push-rod in its movement away from said head, means to move the push-rod toward said head, and means to move the same away from the head.

In testimony whereof I aflix my signature witnesses.

FRANK C. CHLAN.

Witnesses:- I I HENRY RAPE, HARRY CAMPBELL.

in presence of two 

